Andy Murray's New Tennis Partner

Amélie Mauresmo is one of the few women to ever coach a top male pro.

Less than a year after back surgery and in the middle of a mentally taxing season, Andy Murray did something almost unheard of in tennis and professional sports in general: He hired a woman to help him.

Amélie Mauresmo, a former No. 1 player, has stepped in for Ivan Lendl, who had led Murray to two Grand Slam singles titles and an Olympic gold medal. Lendl had tired of traveling around the globe. Murray, who has fallen to No. 9 in...